Flue-cutter.



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(Application med Apr. 2, 1901.)

@ RIE (No Modal.)

YN: Nanms mns co.

UNrrEn STATES PATENT Fries.

CHARLES AUGUST SIVANSON, OF KINBRAE, MINNESOTA, ASSIGNOR OF ONE- IIALF TO EDWARD S. l-IUIWIBLE, OF DUNDEE, MINNESOTA.

FLUE-CUTTER.

SPECIFICATION forming part of Letters Patent N0. 690,205, dated December 31, 1901. Application filed April 2, 1901I Serial No. 54,060. (No model.)

To all whom it may concern:

Be it known that I, CHARLES AUGUST SWAN- SON, a citizen of the United States, and a resident of Kinbrae, in the county of Nobles and State of Minnesota, have invented a new and Improved Flue-Cutter, of which the following is a full, clear, and exact description.

This invention relates to a class of tools eniployed for the removal of tubes or fines from boilers by cutting the body of a due loose from its ends that are secured in the fluesheets, and has for its object to provide a simple practical flue-cutter of novel construction which is very effect-ive in service and is adapted to cut 01T dues or tubes which vary considerably in diameter.

The invention consists in the novel construction and combination of parts,as is hereinafter described, and defined in the claims.

Reference is to be had to the accompanying drawings,forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a side view of the tool arranged for cutting tubes of small diameter. Fig. 2 is a partly-sectional edge view seen in direction of the arrow in Fig. l. Fig. 3 is a side view of parts of the device arranged for cutting larger tubes. Fig. 4 is an enlarged transverse sectional view substantially on the line 4 4 in Fig. l, and Fig. 5 is an enlarged transverse sectional view substantially on the line 5 5 in Fig. l.

In the drawings, l indicates an elongated body-bar which is mainly cylindrical and widened near one end to permit the formation of a longitudinal slot a. in said widened portion 6a. From the outer end of the p0rtion 6a a finger-piece 6b is extended, which is convex on the outer surface and concaved on the inner surface, a shoulder b defining the point of junction between the finger-piece and the enlarged and slotted portion of the body-bar.

Upon an ear 6"', formed or secured on the body-bar 6, one end of the arm 7 is jointed, as at b', said arm extending at the side of the body-bar in direction of the nger-piece 6b. The arm 7 is odset at c to project a short limb 7u on the same toward the concave surface of the finger-piece Gb, and to afford strength a concave corner or fillet is afforded at the inner side of the offset c, which essentially conforms with a rounded portion o', formed on the inner side and lower portion of the slotted member 6a, as shown in Fig. l. The short limb 7EL is rounded in its body and for a portion of its length is reduced in diameter, producing a shoulder d thereon, said diametrically-reduced end portion of the limb receiving the disk cutter 8, held loosely against the shoulder d by a thimble e or equivalent device, the thimble, if employed, being secured in place by a pin e', that passes through a transverse perforation in the thimble and the end portion of the limb 7a.

The disk cutter S is formed of steel and is circular and may have a cylindrical hub cen'- trally perforated for engagement with the cylindric body of the limb .7, the cutting edge being formed by cutting away the periphery of the disk, so as to leave a sharp edge at the transverse center of the disk, as is usual for such cutters.

An adjusting-bolt9 is provided, having its body threaded throughout its length, and at one end is flattened. This flattened 'portion is pivoted within a slot in the arm 7, as shown atfin Figs. l, 2, and 3, the body of the bolt passing loosely through the opposite slots g, formed in the edges of the widened member 6a of the body-bar 6.

On the adjusting-bolt 9 a nut-block 10 is mounted and occupies the longitudinal slot a. in the portion 6gq of the body-bar 6, and in the preferably circular periphery of the nutblock a series of spaced radial perforations h is formed for the reception of a mating end on a pin-wrench of ordinary form.

A driver-shank 11 of suitable length is connected with an end of the body-bar 6 near the ear 6'3 by a gimbal-joint m, the opposite end of the driver-shank having an angular formation n to adapt it for convenient engagement with a rotating device of any suitable character.

If the device is to be used to cut lues or boiler-tubes of comparatively small diameter, then the tool is arranged as shown in Figs. l and 2 and hereinbefore described, the oper- IDO ator inserting the finger-piece 6b and limb carrying the cutter 8 into the end of the tiue until the vshoulders and c contact with the end of the flue held within a flue-sheet. (Not shown.) The arm 7 is now moved away from the body-bar 6 by rotatable adjustment ot the nut-block 10 in a proper direction, which will forcibly impinge the sharp edge of the disk cutter 8 against the inner surface of the iiue, which will be cut by rotary movement of the tool effected by power applied at the end fn, of the driver shank 1l, it being understood that as occasion requires the nutblock 10 is rotatably adjusted to continue pressure of the disk cutter 8 on the iiue until the latter is cnt through its wall. When the llues are cut loose at one end, the operation is to be conducted at their opposite ends, as has been described, which-will obviously release the iiues from the flue-sheets of the boiler.

By providing a gimbal-joint m between the driver-shank 1l and the adjacent end of the body-bar 6 the line-cutter may be very conveniently operated upon iiues that are positionedclose to the inner side of the boilershell, as then the driver-shank may be effectively actuated at an angle to the body-bar and away from the boiler-shell.

When the flue-cutter is to be used for cutting olf fines of considerable diameter, it is then arranged as shown in Fig. 3, wherein it will be seen that the arm 'is reversed in p0- Asition by turning it over, so that the odset portion thereon projects outward 0r away from the finger-piece 6b. To effect this adjustment of parts, the pivots b' andf are removed and subsequently replaced after the arm has been reversed in position, which will so remove the cutter 8 as to adapt it for increased divergence from the finger-piece 6b and obvious contact with the inner surfaces of flues having considerable diameter.

It is claimed that the improved liuc-cutter is very simple, strong, and of compact construction, is readily applied within llues having a wide difference in diameters, and that it will operate effectively in places where ordinary tools for the purpose are very inconvenient to use.

Having thus fully described my invention,

I claim as new and desire to secure by Letters 'Patentl. A flue-cutter,comprisinga body-bar having a slot, 'an arm hinged by one end on a projection from the body-bar, an offset portion on the arm near the free end, acutter held to rotate on said oiset portion, a transverse screw passing loosely through the body-bar across the slot, a nut on the screw held loosely in the slot', said screw engaging the arm for its lateral adjustment, a driver-shank, and a gimbal-joint between adjacent ends of the driver-shank and body-bar.

2. A flue-cutter, comprising an elongated body-bar, an arm pivoted by one end on an ear extended from a side of the body-bar, an oiiset portion on the free end of the arm, a rotatable disk cutter loosely held on said oltset portion, a threaded adjusting-bolt pivoted by one end on the arm above its offset, said bolt passing loosely through the bodybar near one end, au adjusting-nut block mounted on the bolt and occupying a slot in the body-bar, and means to loosely connect one end of the body-bar with a rotating device.

3. A due-cutter, comprising an elongated body-bar, a widened portion thereon near one end and having a longitudinal slot in said widened portion, a finger-piece on the end of the body-bar adjacent to the slot, an arm pivoted by one end on an ear extended from a side of the body-bar, an oset portion on the free end of the arm, a rotatable disk cutter loosely held on said offset portion, a threaded bolt pivoted by one end on the arm above the offset, said bolt passing loosely through the body-bar at right angles to its elongated slot, an adjusting-nut block mounted on the bolt and occupying said slot, and a driving-shank connected loosely with an end of the bodybar so as to be angularly adjusted in dierent directions.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES AUGUST SWANSO N.

Witnesses:

J. H. JOHNSON, HAKIN JOHNSON- 

